> AutoHotkey is a programming language for automation

That's sort of what AppleScript is supposed to be on MacOS I thought? I'm not familiar enough with either AutoHotKey or AppleScript to be able to compare them though

Keyboard Maestro is not just a Macro Recorder. It can control most of the Mac interface and most applications. You can start using it as a recorder but when you learn to to incorporate applescripts and other tricks, it can manipulate the entire Mac experience. I would be lost without it.